Notes: Mariano Rivera will throw batting practice at 10:30 a.m. in Tampa. He will get in his first game on Friday or Saturday. … Hideki Matsui (stiff neck) will skip BP again today. Joe Girardi said Matsui could get in a game early next week. Matsui said it could be a week or 10 days. Matsui said he should have time to get ready for the season. Just a hunch: He starts the season on the DL. … Robbie Cano isn’t playing today because he has an appointment with the dentist. … The Yankees are wearing two patches on their uniforms this season. One for the All-Star game, the other to mark the final season at Yankee Stadium.

I’m going to stick back here and watch Rivera throw before heading over to Dunedin. Check back later for a full report.

UPDATE, 10:05 a.m.: I just flipped through the comments. I can’t believe how many negative and generally ill-informed “fans” there are. Mike Mussina has won 250 games and pitched well last September. How he pitches on March 3 in Kissimmee is meaningless. By your logic, Johan Santana is a bum, too.

But I suspect these are the same people who “knew” the Yankees wouldn’t make the playoffs last June. How did that work out?

Dan Shaughnessy of the Globe calls it the “Fellowship of the Miserable” and he’s exactly right. The talk-radio culture and the internet has spawned this class of fan that hates everybody and everything.

I follow the traffic on my blog closely. It spikes when the Yankees lose or there is some problem with the team. Why is that? Aren’t sports supposed to be fun?

Jeff Karstens threw five pitches on a broken leg for your team last season before he had to be helped off the field. Then he went to Taiwan to throw extra innings to get ready for the season, Then he showed up in Tampa in December to start throwing.

He throws three scoreless innings and the Yankee Panic Society dismisses that to focus on the 40 pitches Mike Mussina threw. Pretty grim. Try and have some fun, it’s spring training and your team looks good.